Astonishing Ant-Man #1

Scott Lang was a down-on-his-luck, divorced ex-con -- until he stole renowned scientist and super hero Hank Pym's size-altering technology in the hopes of saving his daughter's life. Through that act of doing wrong for the right reasons, Scott inadvertently learned how to be a hero himself. With Pym's blessing and his daughter Cassie at his side, he became... The Astonishing Ant-Man! But when a curveball upends Scott's life, will he continue to be a hero, or will he return to his former life of crime?